Die for brick or tile machines



(No Model.) 2 SheetsSheet 1.

I W. W. WALLACE. DIE FOR BRICK OR TILE MACHINES.

No. 436,929. Patented Sept. 23, 1890.

(No Model.) 2 SheetsSheet 2.

W. W. WALLACE. DIE FOR BRICK OR TILE MACHINES.

No. 486,929. Patented Sept. 23, 1890.

WzJt W AWeJ. I 71/1 0 "A0 fiw/aigme. OMM%%%AO W UNITED STATES PATENT OFFICE.

lVILLfAM \V. VVALTTACE, OF \VILLOUGHBY, OHIO.

DIE FOR BRICK OR TILE MACHINES.

SPECIFICATION forming part of Letters Patent No. 436,929, dated September 23, 1890. Applioation filed May 10, 1890. Serial No. 351,276. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM W. WALLACE, of WVilloughby, in the county of Lake and State of Ohio, have invented certain new and useful Improvements in Dies for Brick-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in dies for brick-machines; and it consists in certain features of construction and in combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation. Fig. 2 is a side elevation. Fig. 3 is a rear elevation of the die proper detached from the die-plate. Fig. 4 is a horizontal section on line 00 00, Fig. 1.

A represents that portion of the walls of the brick-machine inclosing the compressionchamber, and to which walls the die is attached. The die mechanism comprises two members 13 and C, the former being known as the die proper and the latter being known as the die-plate, although, generally'speak ing, the word die is supposed to include both members B and 0. Plate 0 is detachably secured to the machine, for instance, by means of button a, and the two members 13 and G are securely fastened together, as shown, by means of screws.

Iwill here remark that the bar of clay forced through the die is afterward severed into bricks, and that with strong tenacious clay there is not much difficulty in shaping the bar of clay so as to make perfect brick; but with brittle clay, especially Where there is an excess of the sandy element, thereis much difficulty in making the bar of clay full and square at the corners, the tendency of the clay being to crack and crumble at the corners of the bar. To remedy this difliculty the construction of members B and G is as follows: The recess or chamber B in the die through which the clay discharges is at the front end of the die rectangular in form, having square, sharp corners, as shown in Fig. 1. This chamber is flaring, the inner or rearward end thereof being considerably larger than the outer end. The receiving capacity of chamber B at the corners is still further increased by enlarging the corners conically, the comparative size and shape of the chamber at the inner end of member 13 being shown in dotted lines b 19,.

Fig. 1. The opening through plate 0 is approximately a continuation of chamber B, having similar flaring walls and rounded corners, the opening at the front side of the plate being, however, a little smaller than the rear end of chamber B. Hence plate 0 overlaps chamber B, say, a sixteenth of an inch (more or less) on all sides. The inner face of plate Othat is to say, the rearward face next the machine, and along the sides and ends of the openingis provided with inwardly-projecting flanges c 0, extending into the compressionchamber of the machine. These flanges at the corners of the opening are in the main cut away, as shown more clearly at c, Fig. 4. lVith such construction the clay enters more freely at the corners of the die by reason of these flanges being cut away at the corners; but in addition to this the broad surface of flanges c, by engaging the clay being forced into the die, causes considerable friction,

whereby the clay is more or less held back or retarded in its passage through the die along the sides and ends of the opening. Hence the extra material forced in at the corners of the die insures full, square corners of the bar of clay forced through the die.

To prevent the corners of the bar of clay from cracking and crumbling and being ragged, I provide as follows: The internal rounded corners of the die are grooved in a circumferential direction, as shown at b, the rear wall of each groove being abrupt, or approximately perpendicular to the axis of the die, while the forward side wall of each groove inclines inward as they extend forward, suband unbroken surface is secured along the corners of the bar of clay, and to further facilitate such smoothing and compacting holes 19 are drilled at the bottom of the different grooves, these holes extending into chambers B whereby some lubricant, usually, steam,

' is introduced at the bottom of the different grooves to soften and temper the clay being molded at the corners. Chambers B are cored in the walls of the die at the corners, these chambers being closed by plate 0. A system of pipes, arranged, preferably, as shown in Fig. 1, comprising a main pipe D and branch pipes d d and d d, supply steam or other lubricant for the purpose.

Were it not for the grooves 1) holes 19 would in a few moments become packed with clay, so that the lubricant could not enter the die, and it is evident that the same would occur if the grooves were reversed-that is, if the abrupt walls of the grooves presented rearward. With the arrangement shown, there is always a space at the bottom of the grooves in which the clay does not enter, by reason of which the lubricant is distributed along the rounded corners with the result aforesaid.

What I claim is-- r 1. In abrick-machine, the combination, with a die, of a die-plate having inwardly-projecting flanges arranged at the sides and ends of the discharging-orifice of the die-plate, such flanges extending into the compression-chamber of the brick-machine, the said flanges being wholly or in part cut away or omitted at the corners of the discharging-chamber, substantially as setforth.

2. In a brick-machine, a die having a tapering discharging-chamber with rounded corners, substantially as shown, and inwardlyprojecting flanges connected with the inner face of the die and located around such discharging-chamber, such flanges being wholly or in part cut away or omitted along the internal rounded corners of the discharging chamber, substantially as set forth.

3. A die having'a flaring discharging-chamber with rounded corners, substantially'as indicated, a series of internal angular grooves extending in a circumferential direction along such rounded section, chambers cored in the walls of the die, holes connecting such chambers with the bottom of the respective angular grooves, and means for supplying such chambers with steam or other lubricant, substan tially as set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this 22d day of February, 1890.

WILLIAM YV. VVALLAOE.

Witnesses:

O. L. GRAY, W. W. WALLACE. 

